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Scientific American, Vol. 46, No. 5 (1882) (1882)
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se illustra- required 180 pounds to run the mills at full speed, and that | goods, in 1872. . They were bought by the National Tube | tions may be traced the distribution of the fragments of they were working at about 125 pounds at the moment of | Company,.in 1879, and placed in the Keystone Mills… … 5.—Principal part of No. 5 boiler, which was thrown over the church on the bluff. 6.—Principal part of No. 6 boiler, that struck the copper works, etc. Fig. 2.—EXPLOSION OF TWO STEAM BOILERS AT THE KEYSTONE ROLLING MILLS, PITTSBURG, PA, © 1882 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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